What could be causing a 9 mil vibration on the I/B journal bearing of a Fluid drive coupling(turbine driven 3600 rpm)at 2400-2600 rpm range? Never had this problem before.Turbine was just overhauled and so was boiler feed pump. Misalignment is one consideration,Oil temp is roughly 160 degrees.
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Vibration on Input bearings for Hydraulic coupling
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